Abstract
AbstractThe study of 2D materials has been a significant and fascinating area, at least since the discovery of graphene. As one of the layered bismuth oxychalcogenides, bismuth oxyselenide (Bi2O2Se) has drawn a lot of attention recently. The study of Bi2O2Se was mainly focused on its thermoelectric performance until its ultrathin 2D structure came to the fore. New physical properties of Bi2O2Se were discovered along with the successful synthesis of 2D Bi2O2Se structures. Few‐layer Bi2O2Se exhibits ultrahigh mobility, outstanding stability, tunable bandgaps, and excellent mechanical properties, showing remarkable performance in electronics and optoelectronics. In this report, an overview of recent advances in Bi2O2Se research is provided, including structure/property modifications, synthetic methods, and practical applications. Theoretical and experimental results on bulk/few‐layer Bi2O2Se are both discussed in this report. Finally, the challenges and outlook for Bi2O2Se are evaluated based on current progress.
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